Each question needs a couples of sentences. 1.How much of the human genome is th
ID: 1385 • Letter: E
Question
Each question needs a couples of sentences.
1.How much of the human genome is thought to
be comprised of genes that encode proteins?
2. Is this sufficient to explain the results of the
human gene invisibility gun?
3. What accounts for the part of the genome that
does not encode protein?
4. What percent of the human genome would
you estimate is taken up by “RNA genes”.
4a. How many protein-encoding genes are
estimated to be in the human genome? How
many “RNA genes”? If protein-encoding
genes comprise 1.5%, then what percent
would you estimate is accounted for by “RNA
genes”?
5. Where are “regulatory sequences” found?
Explanation / Answer
1.Only about 1.5% of the genome codes for proteins, while the rest consists of RNA genes, regulatory sequences, introns and (controversially) "junk DNA" 2. This invisibility gun question probably refers to something theteacher/professor brought up. theres no such thing. 3. less than half ofthe RNA produced by 10 of the chromosomes in human cellsrepresented transcripts of traditional genes. In the team'sexperiments, 57 percent of the RNA was transcribed from noncoding,"junk" regions. between 74percent and 93 percent of the genome produced RNA transcripts. 4. The haploid human genomecontains an estimated 20,000–25,000 protein-codinggenes, 0.8*23,000=18400 genes for RNA 5. A regulatorysequence (also called a regulatory region or aregulatory area) is a segment of DNA whereregulatory proteinssuch as transcription factors bindpreferentially. Regulatory sequences are usually found at the 3' end ofDNA where transcription factors can bind and start thetranscription process.
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